Answer: large and positive.
- A large and positive
- B small and negative
- C small and positive
- D exactly zero
Correct answer: A. large and positive
Explanation: Ferromagnets have a very large positive susceptibility.
Magnetic field lines form closed loops: outside the bar magnet they run from the N pole to the S pole; inside, they continue from S back to N, so the lines never start or end anywhere.
Concept context
Bar magnets, Earth's magnetism, and how different materials respond to an external magnetic field - diamagnetic, paramagnetic, and ferromagnetic behaviour.